pnmalias

Apply antialiasing onto a PNM image. More information: https://netpbm.sourceforge.net/doc/pnmalias.html.

• Perform antialiasing on a PNM image, taking black pixels as background and white pixels as foreground:

pnmalias path/to/input.pnm > path/to/output.ppm

• Explicitly specify the background and foreground color:

pnmalias -bcolor background_color -fcolor foreground_color path/to/input.pnm > path/to/output.ppm

• Apply altialiasing to foreground pixels only:

pnmalias -fonly path/to/input.pnm > path/to/output.ppm

• Apply antialiasing to all surrounding pixels of background pixels:

pnmalias -balias path/to/input.pnm > path/to/output.ppm